package com.niit.bc.servlet;

import com.niit.bc.dao.UserDao;
import com.niit.bc.dao.impl.UserDaoImpl;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

public class CheckUserName extends HttpServlet {

    /**
     * @author 武蓓蓓
     */
    private static final long serialVersionUID = 1L;

    /**
     * The doGet method of the servlet. <br>
     * <p>
     * This method is called when a form has its tag value method equals to get.
     *
     * @param request  the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException      if an error occurred
     */
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        response.setContentType("text/xml");
        request.setCharacterEncoding("utf8");
        response.setCharacterEncoding("utf8");
        PrintWriter out = response.getWriter();

        String userName = request.getParameter("username");
        UserDao userDao = new UserDaoImpl();
        boolean flag = false;
        if (userName != null) {
            flag = userDao.find(userName);
            out.println("<response>");
            if (flag) {
                out.print("<res>" + "true" + "</res>");

            } else {
                out.print("<res>" + "false" + "</res>");

            }
            out.println("</response>");
        }
    }

    /**
     * The doPost method of the servlet. <br>
     * <p>
     * This method is called when a form has its tag value method equals to post.
     *
     * @param request  the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException      if an error occurred
     */
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        doGet(request, response);
    }

    /**
     * Initialization of the servlet. <br>
     *
     * @throws ServletException if an error occurs
     */
    public void init() throws ServletException {
        // Put your code here
    }

}
